Thread-controlling mechanism for sewing machines



April 22 1924. 1,490,972

M. c. umw

THREAD CONTROLLING MECHANISM FOR SEWING MACHINES Filed May 12. "1922Patented Apr. 22, 1924.

NHTED STATES teas??? MARY C. GUINN, F DEWAR, OKLAHOMA.

THREAD-CONTROLLING MECHANISM FOR SEWING MACHINES.

Application filed May 12, 1922. Serial No. 560,315.

To aZZ 7/1/1077 it may concern:

Be it known that I, MARY C. GUINN, a citizen of the United States,residing at Dewar, in the county of Okmulgee and State of Oklahoma, haveinvented certain new and useful Improvements in a Thread-ControllingMechanism for Sewing Machines; and I do hereby declare the following tobe a full, clear, and exact description of the invention, such as willenable others skilled in the art to which it appertains to make and usethe same.

My invention relates to a thread controlling mechanism for a sewingmachine and has for its primary object the provision of a threadcontrolling mechanism simple in construction and effective in operation,in which. the parts are so constructed and arranged with respect to eachother that the thread may be inserted therein with a minimum expenditureof time and elfort.

The invention has for another object the provision of a slack threadcontrolling mechanism in which th parts are arranged to guide andcontrol a plurality of needle threads in a hem. stitch sewing machineand other types of sewing machines.

The invention has for a further object the provision of a threadcontrolling mechanism in the nature of an attachment particularlyadapted to be mounted on a sewinn machine head.

The invention has for a still further ob ject the provision of a threadcontrolling mechanism simple in construction and effective in operationfor taking up slack in a sewing thread during the operation of thestitch forming mechanism.

With the foregoing and other objects in view the invention consists inthe .novel construction and arrangement of cooperate lug partshereinafter more specifically dcstriheil, claimed and shown in theaccompanying drawing in which Figure 1 is a side elevation of a sewingmachine head with my thread controlling mechanism applied thereto,

Figure 2 is a side elevation of the thread controlling .mechanism inposition on the sewing machine head.

Figure 3 is a top plan view of said mechanism with the sewing machinehead shown in section,

Figure 1 is a detail section on the line -iof Figure 2.

of usual construction.

- Secured near the lower end and front edge of the face plate A of thehead 2 is the spring arm thread guide attachment, having a horizontallyprojecting angle-bar 8 provided with a vertically projecting lug 9 and alaterally projecting lug 10' secured to the face plate A by screws 12and 13 respectively. Projecting downwardly from the angle bar 8 are twospaced, parallel angle bars 14; and 15. The angle bar 14 is securedtothe bar 8 by the screw 16 passing through the lugs '17 and 18 on theends or" vertically and horizontally disposed flanges, respectively, ofthe angle bar 8. The angle bar is secured to the face plate A. by one ormore screws 19. Beneath the horizontal flange of the bar 8, andconnecting the upper ends of bars 1% and 15 by means of screws 20 and 21is the horizontal bar 22. Between the b31314: and 15 and spacedtherefrom are two vertical bars 28 and 24 having along their outer edgesinclined thread engaging surfaces 23 and 24L respectively and at theirlower ends lugs 25 and 26, respectively, secured by a screw 2'? on theopposite sides of the rearwardly and upwardly projecting arm 28. Thisarm has disposed on opposite sides thereof and spaced therefrom andsecured thereto by screw 29, two forwardly and upwardly projecting armsand 511 having at their upper ends laterally projecting lugs 32 and 33respectively. As shown in Figure 5 the screw 20 passes through lug 32and secures the same to bar 23 angle bar 14 and horizontal bar 22. Ascrew 21 passes through lug 33 and secures the same to bar24, angle bar15 and bar 22. I

Mounted on the screw 29 and on opposite sides of the arm 28 are coiledsprings 34 and 35. As shown in Figure 3 the spring 3.4, has one endsecured in bar 30, and has its opposite end formed into a long arm 36projecting through the opening between bars 23 and 2%. The free end ofthe arm 36 terminates in a thread engaging hook 37 The spring which issimilar to spring 34: has one end secured in bar 31 and has its oppositeend formed into a long arm projecting through the opening between thebars 23 and 24 and terminating in a thread engaging hook 39.

The sewing threads pass through the guides 3 and 4, tension device 6,the thread engaging hooks 37 and 39, the take-up 7 and guides 5 to theneedles of the sewing machine. One sewing thread passes between the bars14 and 23 and is controlled and guided by the walls thereof during theup and down movement of the'guide 37 in taking up the slack of thethread during the stitch forming operation (see Figure 4-). The otherthread ll passes between the bars 15 and 24 and is controlled and guidedby the walls thereof during the up and down movement of the thread guide38 in taking up slack in the thread during the stitch forming operation.Each of the threads may be quickly inserted in its proper position inthe slack thread controlling device without the operator at any timedisengaging the threads. For instance to place the thread in hook 39 allthat is necessary is to draw the thread below the attachment thenupwardly into the open-ended space between the vertically extendingmembers 15 and 24 and thence into the hook 39.

While a preferred embodiment of the invention has been shown anddescribed it will be understood that minor changes in the details ofconstruction and arrangement of parts may be resorted to within thescope of what is claimed without departing from the spirit of theinvention.

Having thus described the invention, what I claim is 1. In a device ofthe class described, a plurality of spring arms, a. supporting armbetween said spring arms, other supporting arms angularly disposed tosaid first mentioned supporting arm and on opposite sides of said springarms, means for uniting the corresponding ends of said arms, a frame foruniting the corresponding opposite ends of said supporting arms, saidspring arms being secured at the first mentioned corresponding ends,said spring arms having free ends projecting through said frame, andthread guiding hooks on said free ends.

2. A thread controlling mechanism consisting of a frame, the frameincluding a depending bar, means cooperating with the bar to provide athread guide opening, an arm extending rearwardly from the bar, an armextending forwardly from the first arm to the frame and terminatingabove said opening, and a thread guiding hook disposed adjacent saidfirst arm to engage the thread adjacent said opening.

3. A thread controlling mechanism consisting of a frame; the frameincluding a depending bar, means cooperating with the bar to provide athread guide opening, an arm extending rearwardly from the bar, an armextending forward from the first arm to the frame and terminating abovesaid opening, means connecting said arms together, and a thread guidinghook mounted by said means and operatively disposed adjacent saidopening. i. A thread cont-rolling mechanism consisting of a laterallydisposed attaching bar, a bar depending therefrom and having a forwardlyextending lug adjacent its lower end, a bar spaced from the second barand dependin from the first bar to provide a thread guide openingbetween the second and third bars, a rearwardly extending arm secured tosaid lug, a rearwardly extending arm secured to the first bar, meanssecuring said. arms together, and a thread guiding hook positioned bysaid means and operatively disposed adjacent said opening.

5. A thread controlling mechanism consisting of a laterally disposedattaching bar, a. bar depending therefrom and having a forwardlyextending lug adjacent its lower end, a bar spaced from the second barand depending from the first bar to provide a thread guide openingbetween the second and third bars, a rearwardly extending arm secured tosaid lug, a rearwardly extending arm secured to the first bar, meanssecuring said arms together, a thread guiding hook carried by the frameand operatively disposed adjacent said opening, and said thread guidinghook being resilient and having a coil surrounding said means andsecured to one of said arms.

6. A thread controlling mechanism consisting of a laterally disposedattaching bar, bars depending from said bar, a rearw ardly extending armsecured to the second mentioned bars, bars depending from the firstmentioned bar in spaced relation to the second mentioned bars to providethread-guide openings, downwardly and rearwardly extending armsconnected to the first mentioned bar. means connecting the armstogether, coil springs surrounding said means and attached at one end tothe second mentioned arms, and hook arms extending from said springs andbeing operatively disposed adjacent said openings for engagement withthe thread.

In testimony whereof I affix my signature in presence of two witnesses.

MARY C. GUINN.

\Vitnesses L. C. VVILLIAMs, DAILY Prrrrnr.

